Write three precaution to be taken while preforming chemical?
Answers
NOTE: These are 35, you can choose any three.
Answer:
PRECAUTIONS TO BE TAKEN WHILE HANDLING CHEMICALS IN LABORATORIES:
1. All hazardous and toxic chemicals (acids, alkalis, some salts, and organics) must be identified. Material information sheets must be acquired and specific warning sign must be shown for potentially dangerous chemicals.
2. In transport and transfer of chemicals, proper handling precautions provided by manufacturer must be observed. All containers for storage should be chemical resistant, leak free, and with good caps of stoppers.
3. Gloves and goggles should be used while handling chemical of toxic nature. It is preferred that at least two persons should be present at all time while working with chemicals.
4. Heating flammable solvent may cause fire. Such work must be carried out in a well-ventilation fume-cupboard.
5. When your body is contact with the chemical, flush your body with plenty of fresh water and report the accident to the laboratory technician.
6. Waste products and disposals must be discharged with proper neutralization. If the material to be disposed is extremely toxic or poisonous, the material should be kept in closed container and sent to appropriate agency for proper disposal.
7. Keep chemical containers closed. Dust and vapor may escape from an open container, while gases and suspended material may penetrate this, causing the nature of the chemical to change. This will also avoid unnecessary exposure.
8. Never use the wrong or an unmarked reagent. If you are unsure about the compound, do not use it.
9. Once removed from the bottle or glass, cork stoppers must be placed on a clean surface with the opening facing down. This is to avoid contamination of the compound and unnecessary exposure.
10. Chemicals must not be carried by the neck of the bottle, nor next to the body.
11. When pouring from bottles, the label should always face upward to prevent any spillage from destroying the label.
12. Never place any chemicals in the bottle other than the one indicated on the label.
13. Special precautions should be taken when handling concentrated acids. Dilution of acids should be performed by pouring the acid into water.
14. Always label all containers with chemicals.
15. Use protective equipments for eye protection and always wear a lab coat.
16. Avoid intentional smelling, inhaling and tasting of chemicals.
17. Always avoid direct contact with chemicals, far from your hands face, clothes and shoes.
18. Hazardous chemical should be used only as directed.
19. Mark the date on all containers upon receipt and again when reopened.
20. Attach chemical labels with all necessary information to all containers.
21. read the warning labels when opening newly received reagent chemicals
22. A periodic check on chemical containers for rust, corrosion, and leakage is a must.
23. Store bottles in chemical safe bags especially those hazardous and moisture-absorbing chemicals.
24. Smoking, drinking, eating and the application of cosmetics is forbidden in areas where hazardous chemicals are used or stored.
25. Whenever you leave the lab after handling any chemicals wash thoroughly with soap and water. Keep your hands and face clean free from any trace of chemicals.
26. If you have very long hair, please tie it back in the laboratory.
27. Do not pour reagents and chemicals down the sink. Dispose of these only in designated containers.
28. Put plant remains in the designated containers. Do not discard solids or plant materials down the sinks. They will clog up the sink. Use specified containers for such wastes.
29. If glassware accidentally becomes broken, carefully clean it up with a broom and dustpan. Dispose of the broken glass in containers labeled FOR BROKEN GLASS ONLY.
30. Know emergency exit routes.
31. Avoid skin and eye contact with all chemicals.
32. If an unknown chemical is produced in the laboratory, the material should be considered hazardous.
33. Avoid wearing jewelry in the lab .
34. No cell phone or ear phone usage in the active portion of the laboratories, or during experimental operations.
35. Clothing made of synthetic fibers should not be worn while working with flammable liquids or when a fire hazard is present as these materials tend to melt and stick to exposed skin.